Wall Wart with Same Voltage but different Amps

Discussion in 'General Electronics Chat' started by fullNelson, Oct 18, 2012.

  1. fullNelson

    Thread Starter Member

    Nov 14, 2011
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    I am missing a wall wart for one of my two routers. The same exact router I do have a wall wart for says that it's output is 12v and .5A. Since I dont have another one of these, but I do have a 12v 1.5A wall wart can I use it on my router or will that kill it?
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,634
    2,342
    Hello,

    If the old one is 0.5 Amp and the new one is 1.5 Amp with the same voltage, there should be no problems.
    Take care that the polarity of the plugs are the same.
    The attached device will only consume what it needs.

    Bertus
     
  3. fullNelson

    Thread Starter Member

    Nov 14, 2011
    46
    0

    How would I check the polarity? Multimeter?
     
    Last edited: Oct 18, 2012
  4. tracecom

    AAC Fanatic!

    Apr 16, 2010
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    Yes. Normally, the + is on the center pin or hole, and the - is on the outer surface...but not always. Since you can't find the old one, you have no way to know what its polarity was. Or maybe it's marked on the tool near the power jack.
     
  5. fullNelson

    Thread Starter Member

    Nov 14, 2011
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    Both of these devices are Linksys Routers, one has the original WW and the other doesn't. So I do have the original one. And you are referring to testing the center pin on the barrel jack, not the socket yes?
     
  6. ErnieM

    AAC Fanatic!

    Apr 24, 2011
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    That works. Make real sure the router is marked with the power it expects and the wart does the same, least you let all the magic smoke out and kill the router the very first time you plug it in.
     
  7. Audioguru

    New Member

    Dec 20, 2007
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    Yes, the plug or jack is shown with the polarity marked on almost all products and wall warts.
     
  8. spinnaker

    AAC Fanatic!

    Oct 29, 2009
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    Some walwarts are AC. My old Linksys is AC.

    My netgear is DC. But the router itself is not marked.

    If the router is not marked with the polarity you could see if you can find the owners manual on line and perhaps it will list it.
     
  9. spinnaker

    AAC Fanatic!

    Oct 29, 2009
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    Wait you have at least on walwart? Why not just test that one if nothing is marked?

    But at the very least the walwart should be marked with polarity.
     
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